Mid level tropical moisture from Hurricane Frank which was situated off the Baja coast spread northward into southern and central California on August 1. This moisture interacted with a very warm and unstable airmass which was present over the region at the time.
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Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS HNX wrote it up.
Mid level tropical moisture from Hurricane Frank which was situated off the Baja coast spread northward into southern and central California on August 1. This moisture interacted with a very warm and unstable airmass which was present over the region at the time. Showers and thunderstorms broke out during the afternoon and brought moderate to locally heavy rainfall to the mountains and deserts of eastern Kern County as well as to the Sierra Nevada. The heavier thunderstorms prompted the issuance of two Flash Flood Warnings, two Flood Advisories and three Significant Weather Advisories. There were reports of nuisance street flooding as a result of the heavy rainfall.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Hanford, CA wrote its last area forecast discussion before the first event at Aug 1, 11:42 AM PST, 33 minutes earlier.
Area Forecast Discussion National Weather Service Hanford CA 1242 PM PDT Mon Aug 1 2022 .SYNOPSIS...Monsoonal moisture will continue to push into the area resulting in shower and thunderstorm chances over the Sierra Nevada each afternoon and early evening this week. Temperatures will remain near to slightly above climatological averages. && .DISCUSSION... Plenty of mid-level moisture remains, as satellite images shows mid-level and high clouds over much of the region, generally north of Kern County. Current radar shows moderate showers building in the West Side Hills in far SW Merced County and NW Fresno County, including near Pacheco Pass. Some showers are also possible in portions of the San Joaquin Valley into the Sierra Nevada foothills and remainder of the West Side Hills through this evening. Also, there are some cloud buildups and some showers and thunderstorms developing over the mountain and desert areas in Kern County, where skies were earlier mostly clear. Additional showers and thunderstorms will likely develop over the desert and higher terrain later this afternoon into the evening. Flow aloft is turning towards the southwest, which usually signals a drying trend. Although, it might take some time before the threat of showers/thunderstorms shifts more to the Sierra Nevada high country, as the moisture is now interacting with an upper-level low off the Central CA coast. Some mid-level and upper-level moisture is also now moving into Southern CA and Kern County, which is associated with Tropical Storm Frank that is currently several hundred miles off the coast of the southern tip of Baja California. By Tuesday, a further decrease in storm coverage is likely; however, showers and thunderstorms could redevelop during the afternoon and evening towards the Sierra Nevada crest. Little change in the pattern is anticipated for Wednesday, so we will at least have a brief break for most areas until then. However, upper-level high pressure will remain the dominant feature over our region. For Thursday until the weekend, In addition, Tropical Storm Frank is forecast to continue its track north-northwestward over the eastern Pacific Ocean. Most of the moisture is expected to remain offshore as the remnants continue moving north-northwestward. The threat for showers and thunderstorms will also occur on Friday through the weekend, though mainly over the higher elevations of the Sierra Nevada. Otherwise, seasonably warm temperatures will continue over the next several days with increased humidity at times throughout the region. && .AVIATION...Areas of mountain obscuring IFR conditions in and near thunderstorms across the Sierra Nevada, adjacent foothills, and Kern County mountains through 06Z Tuesday. Otherwise, VFR conditions will prevail elsewhere across central CA for the next 24 hours. && .AIR QUALITY ISSUES... None. && .CERTAINTY... The level of certainty for days 1 and 2 is high. The level of certainty for days 3 through 7 is medium. Certainty levels include low...medium...and high. Please visit www.weather.gov/hnx/certainty.html for additional information an/or to provide feedback. && .HNX WATCHES/WARNINGS/ADVISORIES... None. && Public/Aviation/Fire Wx...BSO PIO/IDSS..................DS weather.gov/hanford
Special Weather Statement
National Weather Service San Joaquin Valley CA
1229 PM PDT Mon Aug 1 2022
CAZ334-338-012015-
Mojave Desert Slopes CA-Tehachapi CA-
1229 PM PDT Mon Aug 1 2022
...A strong thunderstorm will impact portions of central Kern County
through 115 PM PDT...
At 1228 PM PDT, Doppler radar was tracking a strong thunderstorm over
Tehachapi, or 32 miles northwest of Lancaster, moving northeast at 15
mph.
HAZARD...Winds in excess of 40 mph and half inch hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor damage to outdoor objects is
possible.
Locations impacted include...
Tehachapi, Golden Hills and Water Canyon.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.
Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
&&
LAT...LON 3504 11843 3507 11852 3526 11849 3521 11827
TIME...MOT...LOC 1928Z 204DEG 12KT 3512 11843
MAX HAIL SIZE...0.50 IN
MAX WIND GUST...40 MPH
DASThe national radar mosaic for the moment the first event began.
2 flood. Local standard time, as filed.
Broadcast media report of street flooding in downtown Tehachapi as the result of heavy rainfall.
California Highway Patrol reported that the intersection of SR 14 and Jawbone Canyon Rd. was completely flooded over as a result of heavy rainfall.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in California in 2022Every state in 2022This day in weather historyWarnings in California, August 2022
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 1035419, 1035420.